Wow. Well, first, the internet is not a place to be if you are in any way thin-skinned. There is no getting around that. The internet is a largely unregulated forum for the free exchange of ideas. Any ideas, be they positive or negative. And if you swim in unguraded waters, you kind of have to be ready for the sharks.
Over at FSTDT, there are a lot of comments made of the "YOU ARE AN (*&@$&" type, it's true. There are also comments that legitimately point out the doctrinal and logical fallacies in the posts quoted. Neither of those are the people to fear however, since there are also a few contributers over there who are quite adept at scathingly ripping apart the hypocracy, absurdity, and theological elitism of the posts.
The people over at FSTDT generally do not come to the boards to harrass the original poster because they don't really seem to be interested in them. It's the posts that interest them. FSTDT is kind of a people-watching club on the internet, where they nudge each other and wink and roll their eyes but don't feel a need to actually go up to the person and point out how foolish they are being.
Would you prefer it if they did?
They have stated that they have no problem at all with any Christian who follows the teachings of Jesus and does not try to ram their faith down the throats of unwilling people or act in a hateful manner from a position of religious self-superiority. I have seen nothing on the site that makes me doubt that statement, despite the fact that there are avowed atheists amongst them. Heck, there are more than a few Christians active on FSTDT as well.
It's harmless, it's fairly innocuous, and it is in no way persecuting you, me, or any other Christian. As a Christian, you should expect to find your words, statements, and actions scrutinized by all around you, and if you spout foolishness, you should not be surprised when people comment on it.
No one has ever wound up on FSTDT who hasn't said something incredibly stupid, absurd, or hateful.
I would post examples, but this is not the proper forum. Check it out of you are interested, anyone can go and comment and read them, they don't even make you register.
Again, when you swim in unguarded waters, be ready for the sharks.